Bio Lecture 17 Evolution

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redheadsrockyeah
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301721
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Bio Lecture 17 Evolution
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2015-05-02 21:26:39
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Bio Lecture 17 Evolution
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Bio Lecture 17 Evolution
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Bio Lecture 17 Evolution
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  1. An organism's fitness is measured by
    the number of offspring it has
  2. There is a population of giraffes. Some have short necks, some have medium-length necks, and some have long necks. If the short-necked individuals are regularly eliminated from the population, this would be an example of
    directional selection
  3. There are many kinds of animals in which males have characteristics that are clearly disadvantageous to them. Which of the following statements offers the best explanation for the retention of these disadvantageous characteristics?
    Females may select males with the disadvantageous characteristics as mates over those males that lack the characteristics.
  4. Many kinds of disease-causing bacteria are resistant to the standard antibiotics that we use to control them. This is because
    there is genetic variety within the species and those that already have genes for resistance are the ones that reproduce.
  5. There is a range of color in mice from black to brown to gray to white. In a region of white sand there is a black volcanic deposit. The white mice survive better on the white sand and the black mice survive better on the black volcanic deposit. This could be an example of
    disruptive selection
  6. The invalid idea that traits gained during an organism's lifetime can be passed on to future generations is
    the theory of acquired characteristics
  7. Which of the following is a common selective agent for natural selection?
    competition for food and other resources
  8. New genes are introduced into a gene pool by
    spontaneous mutations
  9. Characteristics gained during an individual's lifetime are
    acquired
  10. The fittest organism in a population is the
    organism that successfully produces the most offspring
  11. Under natural conditions without modern medicine, which of the following conditions has the LEAST impact on fitness?
    Alzheimer disease, a neurological disorder that generally afflicts individuals over the age of 65
  12. Characteristics gained during an individual's lifetime are
    acquired
  13. f a bacterium with the
    ability to survive the effects of an antibiotic "pops up" in a
    population, it most likely
    resulted from spontaneous mutation.
  14. The idea that organisms with genetically determined
    characteristics that make them better suited for the environment will have more
    surviving offspring is
    the theory of natural selection
  15. The fittest organism in a population is the
    Organism that successfully produces the most offspring
  16. There is a population of giraffes. Some have short necks, some
    have medium-length necks, and some have long necks. If the short-necked
    individuals are regularly eliminated from the population, this would be an
    example of
    directional selection.
  17. Which of the following would constitute a species?
    all the mallard ducks in the world
  18. Which of these factors would be involved in maintaining a
    constant gene frequency in a population?
    lack of migration
  19. The theory that evolution occurred slowly and that changes
    accumulate over long time periods is
    gradualism
  20. Which of the following would be an indication that evolutionary
    change is occurring within a species?
    Some alleles have been lost from the species.
  21. The idea that evolution occurs in spurts of rapid change
    followed by long periods of little change is
    punctuated equilibrium

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